Can I replace the drive inside?

The 4TB disk is user-replaceable, but the unit is built around a single drive, so you gain capacity, not redundancy. Back up anything important to another device or the USB port.

Does it support RAID?

No. There is one drive slot, so there is no mirroring or parity. Treat it as a single copy and keep a separate backup.

Can I stream video from it?

Yes. It has DLNA support, so compatible TVs, consoles and media players can browse and play files stored on it over the network.

How does it compare with a two-bay NAS?

A two-bay unit offers RAID protection and usually faster hardware, at a higher cost and with more setup. The LinkStation 210 is simpler and quieter but has no redundancy.

Can I add more storage later?

You can plug an external USB drive into the USB-A port for extra space or backups. Internal capacity is fixed by the single bay.

Is it fast enough for large backups?

It handles scheduled backups of documents and photos, but large video libraries and many simultaneous users will feel slow on its 800MHz chip and single Ethernet port.